Primer is a type of water-soluble or solvent bituminous compound that is used to cover surfaces or surface substrates for the installation of prefabricated isogum insulation. Isofondo is a type of bitumen soluble in petroleum solvents that, after application to the surface and evaporation of the solvent, leaves a viscous bitumen film layer and insulates against heat.
Installing prefabricated insulation on surfaces that are not slippery or have dust mites will not be of good quality. Primers can be used to prepare the surface for insulation. Also, due to the form of supply of this product, which is in the form of paste or liquid, it is possible to cover inaccessible surfaces with primers.